Hi,

I just upgraded to 2.1 from 2.1b4 and rebuilt the archives (with --wipe) as part of the upgrade.

Unfortunatly this changed all the urls for individual messages, and so links to messages have now broken, and so has googles site:foo search stuff.

This is not good.

Thinking about it there is probably not much anyone can do about it, but does anyone know if downgrading & rebuilding will go back to the old urls?

Are the developers aware that this is an issue?

Is it possible to guess the old message numbers in some deterministic way?

(you could make the links message id's instead of numbers, but then there are broken non-unique message id's out there, so you'd have to generate new ones for the broken ones and keep a cache, or munge the mbox, but the mbox is probably best left alone).

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